Method for forming ceramic films by anode-spark discharge

Details Method for forming ceramic films by anode-spark discharge Method for forming ceramic films by anode-spark discharge

1990-08-28

1992-09-15

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

205320, 205321, 205322, 205323, 427 37, H05F 304

Patent

active

051475154

ABSTRACT:
A method for forming a ceramics film on the surface of a substrate comprises performing spark discharge in an electrolytic bath, wherein the electrolytic bath comprises an aqueous solution of a water-soluble or colloidal silicate and/or an oxyacid salt to which ceramics fine particles and/or specific fine particles are dispersed and the spark discharge is carried out in the electrolytic bath while ensuring the suspended state of the ceramics particles and/or the specific fine particles in the electrolytic bath. The method makes it possible to effectively form, on the surface of a metal substrate, ceramics films having a variety of color tones as well as excellent insulating properties and hardness. Moreover, it further makes it possible to effectively form a composite ceramics film having excellent wear resistance on the surface of a metal substrate.

REFERENCES:
patent: 3812021 (1974-05-01), Craig et al.
patent: 3812022 (1974-05-01), Rogers et al.
patent: 3832293 (1974-08-01), Hradcovsky et al.
patent: 3956080 (1976-05-01), Hradcovsky et al.
patent: 3960676 (1976-06-01), Miyosawa et al.

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